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Finding the Fourth Proportional to 13,824.60, 19,071.02 and 8,780.60

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Solution

The fourth proportional to 13,824.60, 19,071.02 and 8,780.60 is: 12,112.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,824.60 : 19,071.02 = 8,780.60 : x
  2. Step 2: Convert to fraction form
    13,824.60/19,071.02 = 8,780.60/x
  3. Step 3: Cross multiply
    13,824.60x = 19,071.02 × 8,780.60
  4. Step 4: Simplify right side
    13,824.60x = 167,454,858.95
  5. Step 5: Solve for x
    x = 167,454,858.95/13,824.60
  6. Step 6: Final answer
    x = 12,112.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.